Heathkit HW 29A Manual

Page 1

Assembly . 1

and
Operatlon _ TABLE OF CONTENTS -
Specifications. . . . . . . . .......... 2
Introduction. . . . . .' . . . . . ......... 3
Circuit Description. . . . . . . . ....... 4
Construction Notes ....... . . ....... 6
| PartsList .............. ........ 7
6 _ M ET E R Proper Soldering Techniques. . . . . . . . . 9
Step-By-Step Procedure ...... . . . . . . 10
Step-By-Step Assembly. . . . . . . . . . . . . . 11
A M AT E U R Mechanical Assembly. . . . . . . . 11
Preliminary Wiring. . . . . .. . . . . . . . 13
TRANSCEIVER RF Section Wiring ............. . 16
Receiver Section Wiring .......... 19
M O D E L H w _ 2 9 A Audio Section Wiring ............. 20
Power Section Wiring. . . . . . . . . . . . . 22
Front Panel Assembly And
Installation .................... 22
Final Wiring Above Chassis. . . . . . . . . 24
Final Wiring Below Chassis. . . . . . . . . 24
Final Assembly ................... 26
Connecting Cables ................. 27
t Initial Test And Calibration. . . . . . . . . . . 30
Types of antennas ................. 34
Installation Information ............. 36
In Case Of Difficulty. . . . . .......... 37
Troubleshooting Chart ...... . . . . . . . . 38
Service Information ..... . . . . . . . . . . . 39
Service. . ............... . . . . 39
Replacements. ............... . 40
Shipping Instructions. .......... . 40
Warranty. ..................... 41
Bibliography ................ 41
Schematic ...................... 41*
*Fold- out from page.

All prices are subject to change without notice. The Heath
Company reserves the right to discontinue instruments and
to change specifications at any time without incurring any
obligation to incorporate new features in instruments pre-
HEATH COMPANY, viously 801d.

BENTON HARBOR,
MICHIGAN

g a subsidiary of L

i DAYS I ROM mconponneo ..
.' 5 Copyright ac.- I960

It
Heath Cornparw
AH right; reserved 5; 29,: 64

Page 2

SPECIFICATIONS

TRANSMITTER SECTION
Power Input To Final RF Amplifierz. . . . . . . .

FrequencyControl:...................

Modulation: .

COOOOOOOOII IIIIIIIIIIIII

Output Impedancez. . .

IOOIOI'IUI-UCQC.-

RECEIVER SECTION

Receiver Type: .......... . . . .........

SBHSitiv-ity: uuuuuu to IIIIII onto-000000

Speaker Sizez. . . . . . . .

IIOIODOOOOCOIO

Audio Power Output. .

TuningRange: ......... ..............

POWER SUPPLY

Power Rectifierz. . . . . . . . . ........ . . . .
Power Requirements:. . ........ . . . .....
ACCESSORIES

Microphonez. ..... . . . . . . . . . . . .......
Connecting Cablesz. . . . . . .......... . . . .

Approximately 5 watts.

8.333 me to 9.000 mc quartz crystal.
Pin spacing .500.

Pin diameter .093".

FT-241 or FT-243 crystal holder.

AM plate modulation, automatic ally limited to not
more than 100%.

50 or '72 $2.

Superregenerative detector precededby RF pre-
amplifier stage.

Usable with signals as low as 1 microvolt at the
antenna terminals.

3-1 / 2" round.
Approximately 1 watt (undistorted).

50 me to 54 mo.

Two silicon diodes in full-wave voltage doubler
circuit.

With built-in Supply:
105-125 volts 50/60 cycle AC 45 watts.

With external supply:
6 volt operation - 6 volts at 2.35 amps, 260
volts DC at 90 ma.
12 volt operation - 12 volts at 1.2 amps, 260
volts DC at 90 ma.

Ceramic element type, plastic case. Suitable for
either hand or desk operation.

Two supplied, one for 105-125 volt AC operation
and one for 6 or 12 volt external DC power sup-
ply use. Power circuits are automatically

switched for internal or external power supply
use when cable is plugged in.